diff --git a/doc/README.fsl-clk b/doc/README.fsl-clk
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+++ b/doc/README.fsl-clk
@@ -0,0 +1,5 @@
+Freescale system clock options
+
+	- CONFIG_SYS_FSL_CLK
+		Enable to call get_clocks() in board_init_f() for
+		non-PPC platforms.